Circle the choice that gives the best evidence that a chemical reaction occurred.
A.
B.
...
Circle the choice that gives the best evidence that a chemical reaction occurred.
A.
B.
C.
D.
The molecules were separated into individual atoms.
The mass of the magnesium changed.
Smoke that was trapped between the magnesium atoms was given off.
A new substance was formed.
Answers: 2
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